public class People
{
    protected double weight, height;

    public void speakHello()
    {
        System.out.println("yayayaya");
    }

    public void averageHeight()
    {
        height = 173;
        System.out.println("average height:" + height);
    }

    public void averageWeight()
    {
        weight = 70;
        System.out.println("average weight:" + weight);
    }
}